| 摘要 |
Disclosed is a polymer film having a multilayer structure, the multilayer structure including an inner polymer layer interposed between first and second outermost polymer layers, wherein: (i) the inner polymer layer includes a melt blend of: (a) a starch containing a polymer composition including polyethylene, thermoplastic starch, and one or more compatibilizers; (b) a metallocene polyethylene having a melt flow index in the range of 0.5 to 2.5 g/10 min and a density in the range of 0.910 to 0.935 g/cm3; (c) a polyethylene having a melt flow index in the range of 2 to 4 g/10 min and a density in the range of 0.918 to 0.925 g/cm3; and (d) a polyethylene have a melt flow index in the range of 0.05 to 0.2 g/10 min and a density in the range of 0.948 to 0.955 g/cm3; (ii) the first and second outermost polymer layers independently (a) include a metallocene polyethylene having a melt flow index in the range of 0.5 to 2.5 g/10 min and a density in the range of 0.916 to 0.935 g/cm3, or (b) have a heat seal initiation temperature of no greater than 120° C., wherein at least one of the first and second outermost polymer layers has a heat seal initiation temperature of no greater than 120° C. |
